Catechin sublimation pressure and solubility in supercritical carbon dioxide

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• 作者：Felycia Edi Soetaredjo ; Suryadi Ismadji ; Maria Yuliana Liauw ; Artik Elisa Angkawijaya ; Yi-Hsu Ju
• 关键词：(+)-Catechin ; Solubility ; Sublimation pressure ; Density based correlation
• 刊名：Fluid Phase Equilibria
• 出版年：25 November, 2013
• 年：2013
• 卷：358
• 期：Complete
• 页码：220-225
• 全文大小：2416 K

文摘

Solubility of (+)-catechin in SC-CO₂ was measured at several temperatures (313.15, 323.15, 333.15 and 343.15 K) and pressure in the range of 12-26 MPa using ethanol as the co-solvent (5 mol.%). The experimental data were used for the correlation of density dependent solute solubility parameters. The equations of Chrastil, del Valle and Aguilera, Adachi and Lu, Gonz谩lez, and M茅ndez-Santiago and Tejawere fitted very well for the solubility of (+)-catechin. The rate of mass loss of (+)-catechin showed that its sublimation pressure is very low, an indication of the stability of the compound. Thermogravimetric analysis was used to determine the sublimation pressure.